If nothing happens when you enter your serial number, or you see a red cross next to the serial number, the first thing to check is that you have the right trial, for example that you haven't downloaded Web Designer instead of Web Designer Premium, or Designer Pro instead of Photo & Graphic Designer, or an old version instead of the current version.

If you have doublechecked you have the right trial and it still doesn't work you should contact sales via www.xara.com/contact with full details of the problem including which product and which version you are trying to unlock, the serial number you are using and exactly what happens when you try to unlock eg any error messages given.